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Title: Alfa Romeo ME7.3.1 EEPROM memory structure Post by: redtop on October 15, 2014, 10:54:08 AM Did some experimenting on the ME7.3.1 and found the following that is stored in the eeprom:
Odometer [km] 02h-04h. 3 bytes LSB first. Odometer [km] = value / 10 Max engine RPM reached [rpm] 06h 1 byte RPM [rpm] = value * 40 Number of overrevs 0Ah 1 byte number [1] = value Time in overrev [ms] 08h-09h 2 bytes LSB first time [ms] = value * 100 2 byte checksum for 00h-0Dh is located at 0Eh-0Fh (LSB first) and is calculated as 10000h - (sum of 00h-0Dh). Example: 01 01 40 E2 01 00 1E 00 0A 00 64 00 00 00 4F FE Reported by Alfa OBD: Odometer, km: 12345,6 Number of overrevs: 100 Max engine speed counter, msec: 1000 Max RPM reached: 1200 Feel free to continue this thread with more info on the ME7.3.1 EEPROM. Title: Re: Alfa Romeo ME7.3.1 EEPROM memory structure Post by: atomiczen on March 02, 2015, 05:30:15 PM please could you explain me better how calc checksum after edit eeprom in first 12 bit?
Title: Re: Alfa Romeo ME7.3.1 EEPROM memory structure Post by: seishuku on March 02, 2015, 06:03:33 PM 01h+01h+40h+E2h+01h+00h+1Eh+00h+0Ah+00h+64h+00h+00h+00h=01B1h
10000h-01B1h=FE4Fh Checksum= 4Fh and FEh (last two bytes) Title: Re: Alfa Romeo ME7.3.1 EEPROM memory structure Post by: atomiczen on March 03, 2015, 08:55:00 AM clear, thanks
i haven't see the - sign Title: Re: Alfa Romeo ME7.3.1 EEPROM memory structure Post by: DimDim on April 16, 2015, 04:35:57 AM great!!
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